What the heck? I'm in the last dungeon, with all the holy symbols. I went into the door to find the last boss, and he killed me. I loaded my game again, and suddenly all the monsters were dealing about 10 times more damage than before.
Yes, it's supposed to be in a code, but you're not supposed to actually go to the site. You copy and paste the URL into the window that pops up if you go to "File" and then "Open URL...". The website only provides the information for the song.
 "Eukarion Tales"){kind=icon}
 "Notessimo"){kind=icon}